package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.UserNotLoginException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

/**
 * 用户操作业务实现
 *
 * @Author itcast
 * @Create 2023/4/26
 **/
@Service
@Slf4j
public class UserServicelmpl implements UserService{

    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;

    /**
     * 微信登录
     * @param userLoginDTO
     * @return
     */
    public User wxLogin(UserLoginDTO userLoginDTO) {
        //授权码
        String code = userLoginDTO.getCode();
        //获取openid
        String openid = getOpenid(code);

        if(openid == null){
            throw new UserNotLoginException(MessageConstant.LOGIN_FAILED);
        }

        //如果是新用户就自动完成注册
        User user = userMapper.getByOpenid(openid);

        if(user == null){
            //是新用户，自动完成注册
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }

        return user;
    }

    /**
     * 调用微信接口，获取openid
     * @param code
     * @return
     */
    private String getOpenid(String code){
        Map<String, String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        String res = HttpClientUtil.doGet(WX_LOGIN, map);

        //将字符串转为json对象
        JSONObject jsonObject = JSON.parseObject(res);
        return (String) jsonObject.get("openid");
    }
}
